In 5th grade, students are required to solve problems involving the perimeter and area of rectangles. The revised math TEKS 6.8B (model area formulas for parallelograms, trapezoids, and triangles by decomposing and rearranging parts of these shapes), focuses on developing the formulas of other familiar polygons.
A central idea is that we can often find the area of a polygon by relating it to another polygon whose area we already know how to find. In particular, parallelograms and triangles can be related to rectangles. Triangles can also be related to parallelograms.
The following series of videos model the activities presented in the 6th grade Grade Level Team Meeting held on Jan 13, 2015. The activities modeled in the videos can be found in the 6th grade Grade Level Team Meeting Moodle.
A central idea is that we can often find the area of a polygon by relating it to another polygon whose area we already know how to find. In particular, parallelograms and triangles can be related to rectangles. Triangles can also be related to parallelograms.
The following series of videos model the activities presented in the 6th grade Grade Level Team Meeting held on Jan 13, 2015. The activities modeled in the videos can be found in the 6th grade Grade Level Team Meeting Moodle.